An elderly Queens man yesterday put three bullets into his actor son, just two weeks after the younger man came home from California to care for his ailing mother, police said.

Vincent K. Ford, known professionally as Keith Diamond (search), was eating in the kitchen of the family's home in Queens, N.Y., when his dad, Vincent R. Ford, 81, opened fire with a .32-caliber revolver, hitting the actor once in the chin and twice in the torso, cops said.

Police said the shooting was sparked by a disagreement between father and son involving medical care for the ailing mom, who neighbors said is suffering from cancer. Cops said there was no history of domestic disturbances at the house.

"They're nice people, very nice," said neighbor Lavica Harrison, who grew up on the normally quiet block. "They never argued. That's the strange thing."

Of the elder Ford, a retired postal worker, she said, "I never even heard him raise his voice."

Diamond was unconscious in the intensive-care unit at Mary Immaculate Hospital, where he was listed in stable condition.

It was unclear where the mother, retired schoolteacher Sally Ford, was at the time of the shooting.

The living room of the two-story row house had been converted to a sick room, with a hospital bed installed for the mother.

A family friend said Sally Ford's illness has taken a heavy toll on her husband and may have caused him to snap.

"You've watched someone die who you were married to for 40 years, maybe that's why what happened, happened," said Issac Suber, 48.

Suber said the older man suffered from Alzheimer's disease (search), but police said they were unaware of any such diagnosis.

Cops found the bloody revolver in the home's front yard, where several pieces of clothing were also strewn.

The father suffered facial injuries and was treated at Jamaica Hospital. He was then taken to the 113th Precinct station house, where he was charged with first-degree assault and weapons possession.

Sally Ford also was taken to Jamaica Hospital because there was no one at home to take care of her, and was in stable condition, cops said.

First as Keith Ford and then as Keith Diamond, the 42-year-old victim has made numerous film and TV appearances, beginning in 1983's Tom Cruise flick "All The Right Moves." (search

His most recent movie credit is for "The Civilization of Maxwell Bright," a 2003 film featuring Jennifer Tilly and Eric Roberts.

Diamond had many TV guest appearances, turning up at least a half-dozen times on "The Drew Carey Show" and performing on "Law & Order," "Martial Law," "NYPD Blue," "Charmed," "ER" and "The Cosby Show."

He also provided the voice of Agent J on the animated "Men in Black" (search) TV series.